Mindfulness is needed in all instances. It has the capacity to connect with and accept whatever phenomenon is presenting itself at any of the six sense doors without judgement, evaluation or the attachment of self-identification. Mindfulness is the "mother" of all the factors of enlightenment. It offers the great intimacy with experience that is needed for the door of truth to open.

Spiritual joy-bliss-rapture makes the mind/the heart bright, light, pliable, and open. It's rooted in our practice along the way of this journey to awakening. This bright and buoyant energy of mind and body helps to inspire and sustain the effort that is needed for practicing.
The bright and buoyant energy of joy, this "lightness of being", and the arising calm and quiet of a tranquil body and mind are essential aspects and fruits of this path along the way to awakening.

The enlightenment factor of tranquility, the calm serenity that begins to evolve out of the connection, interest and joy in seeing things more directly and clearly, brings a quieting of the disturbances of mind and body. Tranquility prepares the mind for deepening concentration, which is the 6th enlightenment factor. With a strengthening of moment-to-moment concentration, clarity and insight arise quite naturally.